Improvement in paper-pulp engines



HNe-@Qh pulp ing Engin@ A, n g1 f" mm JUL 111871 116978 l: Iggy X3 Y M. v ZKM/54.40%

UNITED STATES PATENT OFFICE.

HARRISON B. MEEOH, OF FOR-T EDWARD, NEW YORK.

IMPROVEMENT IN PAPER-PULP ENGINES.

To all whom fit may concern:

Be it known that I, HARRISON B. MEECH, of Fort Edward, in the county of W'ashington and in the State of New York, have invented certain new and useful Improvements in Pulping-Engi nes for disintegrating straw, wood, and other fibrous substances to a pulp for paper; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing and to the letters 0f reference marked thereon.

The nature of my invention consists in a pulping-engine for disintegrating and separating the fibers from each other and the vegetable matter by means of a boiling, rubbing, and grinding operation.

To enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, reference being had to the accompanying drawing and the letters of reference marked thereon which form a part of this specification, and in which- Figure 1 is an elevation of the pulping-en gine. Fig. 2 represents the inner revolving double-cone cylinder y yf, which revolves within the case or cones m w. The surfaces ofthe cylinder y y and the inner surfaces of the cones 1v w are made of steel, malleable or chilled iron, or of stone, and are constructed in sections so as to be readily repaired when worn out or broken. The grindingsurfaces are grooved and ruffed something like a millstone, the grooves, &c., being` arranged in such a manner as to gather, rub, and grind the stock while passing through the engine, and to work it after entering the induction-pipe c over the surface of the cone y, and the inner surface of the cone a', to the surface of the cone y and inner surface of the cone and out through the pipe c'. Figs. 3 and 4 are inside views of the cones D represents the inside of the half represented by x, and B shows the half represented by m. Fig. 5 shows the bolts s s for adjusting the cones w w', in combination with the index H for indicating when each bolt is moved the same distance.

For reducing or disintegrating the fibers of wood or straw from each other the wood or straw should be cut into short lengths, then placed within a vessel or close boiler with clear water or liquor, the disintegrating-engine being connected with the vessel or boiler. The cylinder y y being operated by means of power applied to the pulleys m m on the axle of the cylinder, the straw or wood will pass through the engine While boiling, and continue to pass through until the fibers are thoroughly rubbed, ground, and separated ing the material in one or two waters the stock may be boiled and ground in a weak solution of alkali, according to the quality of paper that it is desired to make. For white paper, about onethird ofthe chemicals lmay be used that are now used by boiling without grinding, say from one hundred to two hundred pounds of caustic soda to the ton of stra-w. Other solvents maybe used in combination with this machine. The stock to be pulped may be boiled in any vessel, with or without steam-pressure, but I prefer to use an upright steam-tight boiler and boil the straw or wood at the same time it is grinding in a solution at a temperature of about 3000 Fahrenheit. By means of a swivel-screw on the shaft of the double-cone cylindeny y to adjust it to grind or rub more closely against o 1e of the outside cones than the other, and the olts s s for adjusting the outside cones, the grinding and quality of the stock and its passage through the engine may be easily regulated.

Pulp-engines have been made with a nut having blades on its flat face, With corresponding grindmg-surfaces on the inside ofthe case. These blades fail to macerate the stock properly, and tend to cut the fibers, while my machine thoroughly macerates and leaves the stock in a desirable condition.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

The double cone cylinder and double cone shell surrounding the same, both having uneven siu'face-plates for grinding straw, wood, grass, and the like, substantially as described.

HARRISON B. MEEOH.

Witnesses:

N. B. CHAPMAN, PETER FOLAND. 

